_populate_relations

# File lib/bundler/graph.rb, line 32
    def _populate_relations
      parent_dependencies = _groups.values.to_set.flatten
      loop do
        break if parent_dependencies.empty?

        tmp = Set.new
        parent_dependencies.each do |dependency|
          child_dependencies = spec_for_dependency(dependency).runtime_dependencies.to_set
          @relations[dependency.name] += child_dependencies.map(&:name).to_set
          tmp += child_dependencies

          @node_options[dependency.name] = _make_label(dependency, :node)
          child_dependencies.each do |c_dependency|
            @edge_options["#{dependency.name}_#{c_dependency.name}"] = _make_label(c_dependency, :edge)
          end
        end
        parent_dependencies = tmp
      end
    end